checks: ensure clanModules are clan-config compatible

checks/flake-module.nix

@@ -0,0 +1,5 @@
+{
+  imports = [
+    ./schema.nix
+  ];
+}

checks/schema.nix

@@ -0,0 +1,50 @@
+{ self, lib, inputs, ... }:
+let
+  inherit (builtins)
+    mapAttrs
+    toJSON
+    toFile
+    ;
+  inherit (lib)
+    mapAttrs'
+    ;
+  clanLib = self.lib;
+  clanModules = self.clanModules;
+
+  baseModule = {
+    imports =
+      (import (inputs.nixpkgs + "/nixos/modules/module-list.nix"))
+      ++ [{
+        nixpkgs.hostPlatform = "x86_64-linux";
+      }];
+  };
+
+  optionsFromModule = module:
+    let
+      evaled = lib.evalModules {
+        modules = [ module baseModule ];
+      };
+    in
+    evaled.options.clan.networking;
+
+  clanModuleSchemas = mapAttrs (_: module: clanLib.jsonschema.parseOptions (optionsFromModule module)) clanModules;
+
+in
+{
+  perSystem = { pkgs, ... }:
+    let
+      mkTest = name: schema: pkgs.runCommand "schema-${name}" { } ''
+        ${pkgs.check-jsonschema}/bin/check-jsonschema \
+          --check-metaschema ${toFile "schema-${name}" (toJSON schema)}
+        touch $out
+      '';
+    in
+    {
+      checks = mapAttrs'
+        (name: schema: {
+          name = "schema-${name}";
+          value = mkTest name schema;
+        })
+        clanModuleSchemas;
+    };
+}

flake.nix

@@ -22,7 +22,7 @@
         "aarch64-linux"
       ];
       imports = [
-        # ./checks/flake-module.nix
+        ./checks/flake-module.nix
         ./devShell.nix
         ./formatter.nix
         ./templates/flake-module.nix